Epoxy calculator

Three products share the word and their maximum pour depths are ten times apart. Work out what a table, river, coaster or tumbler takes, split it into resin and hardener, and check the depth before you mix anything.

7 calculators

MOST USED Epoxy calculator Volume by shape and depth, split into resin and hardener, with the depth ceiling checked. Open calculator →

Mix ratio Resin to hardener from the ratio on your bottle, both conventions at once. Open calculator → Silicone mold Silicone to pour your own mold around a master, the box, minus what the object displaces. Open calculator → Coverage How far a gallon goes at your coat depth, and how many kits that is to buy. Open calculator → Pricing Cost per cast piece with the mold and your time in it, and the price that leaves after fees. Open calculator → Mold chart What each mold holds and the Shore hardness that decides how it releases. Open calculator → Kit value Cost per litre from the prices you see, the comparison a shelf full of listings cannot give you. Open calculator →

QUIZ · 5 QUESTIONS Which resin should you use? Take the quiz →

Works for every craft

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Batch size calculator Any formula, any batch → Craft pricing calculator Cost, wholesale, retail, fees → Fragrance calculator Craft first, then the load →

Read before your next batch

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RESIN How to make resin art → RESIN UV resin → RESIN Resin vs epoxy: which type to buy → RESIN · SAFETY Deep pour vs table top epoxy → RESIN · SAFETY Food safe epoxy resin → RESIN Best resin molds → RESIN Best mica powder and pigments for resin → RESIN Epoxy river table → RESIN Epoxy countertops and bar tops → RESIN Resin coasters, trays and small casts → RESIN How to make silicone molds → RESIN How to make resin jewelry → RESIN Where to buy epoxy resin → RESIN Why is my resin sticky, bubbly or yellow? → RESIN Resin kits and equipment →

Kit for resin

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Silicone resin molds

The number that matters is the one listings omit: what a cavity actually holds. Buy a glossy mold rather than a matt one, a matt cast has to be sanded and polished back to clear, which is hours a good mold skips.

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Deep pour casting epoxy

The slow one, and the only sensible answer for anything with a shape of its own. Check the stated maximum depth on the data sheet before you fill a form, going past it is a heat hazard, not a slow cure.

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Mica powder set

A little goes a very long way and the pearl effect disappears at high loads, because the flakes stop being able to lie flat. Past about 6% by weight the cure goes soft.

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Digital scale (0.01 g)

The ratio is a stoichiometry, not a recipe, and the commonest failure in the craft is measuring by weight to a figure the bottle stated by volume. A scale is the cheapest fix for the most expensive mistake.

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Nitrile gloves

Uncured epoxy is a skin sensitizer and the sensitivity is cumulative, a year of bare-handed work can end in a reaction that does not go away. Vinyl and latex are not adequate; the resin goes through them.

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Free printable

Print the pour-depth card

Maximum pour depth and cure windows by resin type, the number that cracks a casting. Free.

PRINTABLE · 12 PAGES

The Resin Pour Log

One page per pour, system, ratio, depth, lifts, pigment load and what went wrong, so the next batch is not a guess.

$9 Buy & download